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synced 2024-09-12 13:28:00 +02:00
shader_compiler: support const buffer indirect addressing in GLSL
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parent
a45baa0e78
commit
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@ -35,6 +35,15 @@ std::string_view OutputVertexIndex(EmitContext& ctx) {
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return ctx.stage == Stage::TessellationControl ? "[gl_InvocationID]" : "";
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}
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std::string ChooseCbuf(EmitContext& ctx, const IR::Value& binding, std::string_view index) {
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if (binding.IsImmediate()) {
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return fmt::format("{}_cbuf{}[{}]", ctx.stage_name, binding.U32(), index);
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} else {
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const auto binding_var{ctx.var_alloc.Consume(binding)};
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return fmt::format("GetCbufIndirect({},{})", binding_var, index);
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}
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}
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void GetCbuf(EmitContext& ctx, std::string_view ret, const IR::Value& binding,
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const IR::Value& offset, u32 num_bits, std::string_view cast = {},
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std::string_view bit_offset = {}) {
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@ -55,8 +64,8 @@ void GetCbuf(EmitContext& ctx, std::string_view ret, const IR::Value& binding,
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const auto swizzle{is_immediate ? fmt::format(".{}", OffsetSwizzle(offset.U32()))
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: fmt::format("[({}>>2)%4]", offset_var)};
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const auto cbuf{fmt::format("{}_cbuf{}", ctx.stage_name, binding.U32())};
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const auto cbuf_cast{fmt::format("{}({}[{}]{{}})", cast, cbuf, index)};
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const auto cbuf{ChooseCbuf(ctx, binding, index)};
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const auto cbuf_cast{fmt::format("{}({}{{}})", cast, cbuf)};
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const auto extraction{num_bits == 32 ? cbuf_cast
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: fmt::format("bitfieldExtract({},int({}),{})", cbuf_cast,
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bit_offset, num_bits)};
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@ -140,9 +149,9 @@ void EmitGetCbufF32(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding,
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void EmitGetCbufU32x2(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding,
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const IR::Value& offset) {
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const auto cbuf{fmt::format("{}_cbuf{}", ctx.stage_name, binding.U32())};
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const auto cast{ctx.profile.has_gl_cbuf_ftou_bug ? "" : "ftou"};
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if (offset.IsImmediate()) {
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const auto cbuf{fmt::format("{}_cbuf{}", ctx.stage_name, binding.U32())};
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static constexpr u32 cbuf_size{0x10000};
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const u32 u32_offset{offset.U32()};
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const s32 signed_offset{static_cast<s32>(offset.U32())};
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@ -162,17 +171,17 @@ void EmitGetCbufU32x2(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding
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return;
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}
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const auto offset_var{ctx.var_alloc.Consume(offset)};
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const auto cbuf{ChooseCbuf(ctx, binding, fmt::format("{}>>4", offset_var))};
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if (!ctx.profile.has_gl_component_indexing_bug) {
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ctx.AddU32x2("{}=uvec2({}({}[{}>>4][({}>>2)%4]),{}({}[({}+4)>>4][(({}+4)>>2)%4]));", inst,
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cast, cbuf, offset_var, offset_var, cast, cbuf, offset_var, offset_var);
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ctx.AddU32x2("{}=uvec2({}({}[({}>>2)%4]),{}({}[(({}+4)>>2)%4]));", inst, cast, cbuf,
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offset_var, cast, cbuf, offset_var);
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return;
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}
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const auto ret{ctx.var_alloc.Define(inst, GlslVarType::U32x2)};
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const auto cbuf_offset{fmt::format("{}>>2", offset_var)};
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for (u32 swizzle = 0; swizzle < 4; ++swizzle) {
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ctx.Add("if(({}&3)=={}){}=uvec2({}({}[{}>>4].{}),{}({}[({}+4)>>4].{}));", cbuf_offset,
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swizzle, ret, cast, cbuf, offset_var, "xyzw"[swizzle], cast, cbuf, offset_var,
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"xyzw"[(swizzle + 1) % 4]);
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ctx.Add("if(({}&3)=={}){}=uvec2({}({}.{}),{}({}.{}));", cbuf_offset, swizzle, ret, cast,
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cbuf, "xyzw"[swizzle], cast, cbuf, "xyzw"[(swizzle + 1) % 4]);
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}
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}
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@ -359,6 +359,7 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
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header += "layout(location=0) uniform vec4 scaling;";
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}
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DefineConstantBuffers(bindings);
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DefineConstantBufferIndirect();
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DefineStorageBuffers(bindings);
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SetupImages(bindings);
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SetupTextures(bindings);
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@ -436,6 +437,24 @@ void EmitContext::DefineConstantBuffers(Bindings& bindings) {
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}
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}
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void EmitContext::DefineConstantBufferIndirect() {
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if (!info.uses_cbuf_indirect) {
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return;
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}
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header += profile.has_gl_cbuf_ftou_bug ? "uvec4 " : "vec4 ";
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header += "GetCbufIndirect(uint binding, uint offset){"
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"switch(binding){"
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"default:";
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for (const auto& desc : info.constant_buffer_descriptors) {
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header +=
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fmt::format("case {}:return {}_cbuf{}[offset];", desc.index, stage_name, desc.index);
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}
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header += "}}";
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}
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void EmitContext::DefineStorageBuffers(Bindings& bindings) {
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if (info.storage_buffers_descriptors.empty()) {
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return;
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@ -162,6 +162,7 @@ public:
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private:
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void SetupExtensions();
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void DefineConstantBuffers(Bindings& bindings);
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void DefineConstantBufferIndirect();
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void DefineStorageBuffers(Bindings& bindings);
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void DefineGenericOutput(size_t index, u32 invocations);
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void DefineHelperFunctions();
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@ -105,7 +105,7 @@ struct ImageDescriptor {
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using ImageDescriptors = boost::container::small_vector<ImageDescriptor, 4>;
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struct Info {
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static constexpr size_t MAX_INDIRECT_CBUFS{16};
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static constexpr size_t MAX_INDIRECT_CBUFS{15};
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static constexpr size_t MAX_CBUFS{18};
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static constexpr size_t MAX_SSBOS{32};
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